Air KongŪ Tennis Stick with Rope - Dogs were born to chase. Kong has taken the most popular dog toy of all time and added a wild side! Air Dog Toys are just what they look like: 100% pure tennis balls, made in the same factory, using the same materials as any high-quality tennis ball. The result is an affordable, super-rugged fetch toy. Give it a throw! Fun in the snow and water too! Packaging for Small is slightly different.